Wheel-tire.



C. SCHRAGIN. WHEEL TIRE.

APPLICATION FILED AUG-7. l9l2.

Patented May 2,1916.

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tional view of part of the tire;

Parana @FFIQE.

GHONON SGHRAGrIN, 0F BERLIN, GERMANY.

WHEELTIRE.

Specification of Letters Patent.

Patented May 2, 191$.

Application filed August 7, 1912. Serial No. .?13,698.

To all whom it may concern:

Be it known that I, CHoNoN SoIaRAcIN, residing at Berlin, Germany, haveinvented an Improved Wheel-Tire, of which the following is aspecification.

This invention relates to an automobile tire of novel constructionhaving expanslble cells in which a continuous ventilation and a constantexchange of warm and cold air automatically takes place, so that theresiliency of the tire is greatly increased and jolting is prevented.

In the accompanying drawing: Figure 1 is a side view of a wheel providedwith a tire embodying my invention; Fig. 2 a see- Fig. 3 a detail of thewheel rim, and Fig. 4 an enlarged cross section of Fig. 2.

The body 6 of the tire-core contains a plurality of cavities or crosschannels as, extending therethrough from side to side. Each channel isclosed at its ends by leather or similar flexible heads 71' set into thechannels, and which may be plaited if desired. The tire is furnishedwith a flexible covering it which extends over the heads 91' so that inthis way the channels are effectively closed and form a plurality ofcompressible air chambers within the tire. The channels are separatedfrom each other by radial walls or partitions of the tire. Each channela communicates with the atmosphere by means of a radially disposedexhaust and intake tube 6 extending through the inner sideof the channeland accommodated within corresponding bores 03 of the felly 0 and themetallic wheel rim 0 (Fig. 3). Tubes Z1 extend a distance beyond theinner face of felly c, the free ends ofthe tubes being accommodatedbetween the spokes 9. These inner ends of the tubes are bent laterallyin a direction opposite to that of the wheel travel, and are enlargedinto a funnel shape, the mouths of the funnels being protected againstdust and dirt by means of wire screens 6 The tubes 6 are insertedsubsequent to the fitting of the tire 11 upon the wheel rim.

In use, the warmed air contained in channels a is expelled therefromthrough tube b when the channels arrive at their lowermost position, inwhich they are compressed by the load. When upon the cessation of suchpressure, the channels expand into their normal form, the exterior coldair will be drawn into the same. In this way, there will take place aconstant uniform exchange of cold and warmed air, resulting in acontinuous ventilation and a high resiliency in the tire, whilefurthermore jolting is effectively prevented.

The ventilation and exchange of. air are automatically regulated by theturning of the wheel, each rotation efi'ecting a single air exhaust andair intake for each channel by means of bending the flaring ends of thetubes in a direction opposite to that of the travel, the ingress ofwater, dust and dirt is efiectively prevented.

By my invention, various important ad vantages are obtained. Thus thefrequent and tedious pumping of air and the result ing occasionalbursting of the tire are prevented. So also the warm air contained inthe tire, the temperature of which frequently rises in the tiresheretofore known up to the burning degree, and which is thereforeextremely injurious, is entirely removed, and a constant exchange of airis maintained. Finally, as the several cavities of the tire are not inintercommunication,

and as each cavity is provided with its individual air supply, thedanger that the entire tire may blow up is entirely obviated."

I claim:

1. In a tire, a core provided with a plurality of separate channelsextending therethrough from side to side, radially disposed separationwalls between the channels, flexible heads fitted into the ends of thechan nels, combined with a flexible covering mounted on the core theends of said channels, and means for connecting each of the channelswith the atmosphere, whereby each separate channel is enabled during therevolution of the tire to aspirate and thereby to maintain the airwithin the channel in a cool condition.

2. A tire provided with a plurality of separate channels extendingtherethrough and extending over from side to side, radially disposedseparation Walls between the channels, flexible heads fitted into theends of the channels, a flexible covering mounted on the tire andextending over the ends of said channels,

and an aspiration conduit in each separate channel, said aspirationconduit being disposed radially and adapted to freely dis-' charge anddraw in air.

CHONON SCHRAGIN.

